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Renesas ISL91107IRTAZ-T
- Part No.:
- ISL91107IRTAZ-T
- Manufacturer:
- Renesas
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
ISL91107IRTAZ-T.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
ISL91107IRTAZ-T from Renesas (formerly Intersil) is a fully synchronous 4-switch buck-boost DC/DC regulator delivering up to 2A output current with 2.5MHz switching frequency, 45µA quiescent current, and 1.8V–5.5V input range. It operates in adjustable-output mode (via FB pin), supports seamless buck-to-boost transitions, and targets space-constrained portable power rails.
For engineers reviewing the ISL91107IRTAZ-T datasheet, ISL91107IRTAZ-T pinout, ISL91107IRTAZ-T application, or ISL91107IRTAZ-T equivalent, key selection criteria include its adaptive PFM/PWM mode control, integrated 4.1A switches, thermal shutdown at 150°C, soft-discharge function (35Ω), and compatibility with 1µH inductors and ceramic output capacitors for compact designs.
Technical Context
The ISL91107IRTAZ-T implements a true 4-switch buck-boost topology with independent gate drivers and anti-shoot-through logic, enabling automatic mode transitions without output disturbance. Its dual-input architecture separates PVIN (power path) from VIN (bias supply), and uses dedicated SGND/PGND pins to isolate analog reference integrity from high di/dt switching currents.
Control is managed by an internal PWM controller with programmable MODE pin (PFM auto or forced PWM), soft-start ramping (1–3ms depending on mode), and hysteretic PFM thresholds (300–375mA). Protection includes overcurrent detection via FB monitoring, undervoltage lockout (1.75V rising), and thermal shutdown with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, USB, and multi-rail battery systems without pre-regulation. |
| Output Current | Up to 2A at VOUT = 3.3V, PVIN = 2.8V - sufficient for core SoC rails and high-brightness display backlight drivers. |
| Switching Frequency | 2.5MHz (±10%) - enables use of 1µH inductors and minimizes solution footprint in mobile PCBs. |
| Quiescent Current | 45µA in PFM mode - extends battery life in always-on sensor or standby subsystems. |
| Feedback Reference | 0.8V ±1.25% - sets adjustable output range from 1V to 5.2V using external resistor divider. |
| Efficiency Peak | 96% at 3.3V out, 1A load, 3.6V in - reduces thermal load in thermally constrained enclosures. |
| Thermal Shutdown | 150°C with 30°C hysteresis - ensures safe recovery after transient overload without manual reset. |
Pinout & Package
ISL91107IRTAZ-T is housed in a 3mm × 4mm, 20-lead TQFN package (RoHS-compliant, L20.3x4A outline) with exposed thermal pad connected to PGND for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 7–10) | Power input rail | High-current input path (1.8V–5.5V); requires local 22µF ceramic capacitor to PGND. |
| VIN (Pin 12) | Bias supply input | Provides stable voltage for internal reference generation; same voltage range as PVIN but lower current. |
| LX1 (Pins 5–6) | Inductor input-side switch node | Connects to one end of external inductor; carries full switching current in both buck and boost phases. |
| LX2 (Pins 1–2) | Inductor output-side switch node | Connects to other end of inductor; complements LX1 to complete 4-switch conduction paths. |
| EN (Pin 13) | Enable control input | Active-high logic input; drives device into low-IQ shutdown (<0.6µA) when pulled low. |
| MODE (Pin 14) | Operating mode select | LOW = forced PWM (fixed frequency), HIGH = auto PFM/PWM transition; determines light-load behavior. |
| FB (Pin 16) | Feedback voltage sense | Monitors resistive divider output; regulates VOUT to 0.8V reference - enables 1V–5.2V adjustable outputs. |
| VOUT (Pins 17–20) | Regulated output | Delivers final buck-boost output; requires 2×22µF X5R ceramic capacitors to PGND for stability and transient response. |
| PGND (Pins 3–4) | Power ground | High-current return path for LX1/LX2 and PVIN capacitors; must be low-impedance copper plane. |
| SGND (Pin 15) | Analog ground | Reference ground for FB, EN, MODE, and internal error amp; must be isolated from PGND noise. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Zero-output-disturbance mode switching eliminates voltage glitches during VIN crossing VOUT - critical for noise-sensitive RF and audio rails. |
| Soft-discharge function | 35Ω internal discharge path from VOUT to SGND upon disable - prevents floating output and enables fast system power-down sequencing. |
| Low-noise analog partitioning | Dedicated SGND and separate VIN bias supply minimize reference noise coupling - improves output voltage accuracy to ±2% in PWM mode. |
| Integrated protection suite | Combines short-circuit detection (via FB under-voltage), thermal shutdown (150°C), UVLO (1.75V), and anti-shoot-through logic - eliminates need for external fault management circuitry. |
| Compact 2.5MHz operation | Enables 1µH inductor with ≥4.1A saturation rating and small 0603/0805 ceramic caps - reduces total solution area to <25mm². |
Applications
| Smartphone Core Rail | USB-Powered IoT Hub |
|---|---|
Use Scenario: Powering application processor I/O or memory interface requiring stable 3.3V from variable Li-ion battery (3.0–4.2V) or USB 5V input. IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining regulated output while input voltage crosses output threshold during battery discharge or source switching. Use Value: Eliminates need for separate buck + boost converters; maintains regulation across full battery range without output sag or glitch during mode transitions. |
Use Scenario: Providing 2.8V or 3.3V rail to microcontroller and wireless transceiver in battery-backed USB-C peripheral with input ranging from 4.75V to 5.5V or 2.8V to 4.2V. IC Role / Device Role / Timing Role: Single-stage wide-input regulator supporting both USB host and battery backup modes without reconfiguration. Use Value: Reduces BOM count and PCB area versus dual-regulator solutions; 45µA quiescent current extends battery runtime in sleep states. |
| Optical Transceiver Module | Industrial Sensor Node |
Use Scenario: Generating precise 3.3V supply for SFP+ or QSFP optical modules where input may vary between 3.3V (backplane) and 5V (auxiliary supply). IC Role / Device Role / Timing Role: High-efficiency, low-noise power stage ensuring clean supply for laser driver and CDR circuits. Use Value: 96% peak efficiency and 2.5MHz operation minimize heat and EMI near sensitive analog front-ends; soft-start prevents optical burst errors at power-up. |
Use Scenario: Powering ultra-low-power MCU, LoRa/Wi-Fi radio, and analog sensor interface from primary 3.6V Li-SOCl₂ cell or 5V field bus. IC Role / Device Role / Timing Role: Adjustable-output buck-boost regulator delivering 1.8V or 2.5V with minimal quiescent draw during extended sleep cycles. Use Value: Programmable VOUT via FB divider enables optimal voltage scaling; PFM mode sustains 45µA IQ across entire input range for >10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2918GQ-Z | 4-switch architecture, 2.2MHz, 2A output, but fixed 3.3V/5V options only; no adjustable FB pin. | Not suitable for designs requiring custom VOUT below 3.3V or above 5V; lacks MODE pin for PFM/PWM control. | Select MP2918GQ-Z only if fixed output and simpler control interface are acceptable trade-offs for comparable efficiency and size. |
| TPS63802DLAR | 4-switch, 2A, 2.5MHz, adjustable output via FB, but higher 75µA quiescent current and no soft-discharge function. | Less ideal for battery-powered systems requiring fast, controlled VOUT discharge during shutdown sequences. | Choose TPS63802DLAR when TI ecosystem integration or specific thermal performance data is prioritized over lowest IQ or active discharge capability. |
Compared with MP2918GQ-Z and TPS63802DLAR, the ISL91107IRTAZ-T uniquely combines adjustable output, 45µA IQ, integrated soft-discharge, and robust 4.1A internal switches - making it optimal for compact, battery-sensitive applications demanding design flexibility and fast power sequencing.
Availability
ISL91107IRTAZ-T is available at Aetrix Electronics and suitable for smartphone power management, USB-C peripheral design, optical module supply, industrial sensor nodes, and portable medical devices requiring stable component supply across long production lifecycles.
Supply support for ISL91107IRTAZ-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog power, and mixed-signal solutions, serving automotive, industrial, and infrastructure markets with high-reliability silicon.
The ISL91107IRTAZ-T belongs to Renesas' high-efficiency buck-boost regulator family, designed specifically for space-constrained, battery-powered portable electronics needing seamless input-voltage crossover operation and ultra-low quiescent current.
FAQ
What output voltage range does the ISL91107IRTAZ-T support?
The ISL91107IRTAZ-T supports an adjustable output voltage range from 1V to 5.2V using an external resistor divider connected to the FB pin. Its internal 0.8V feedback reference enables precise programming, and the device maintains ±2% output accuracy in PWM mode across temperature and load conditions. This flexibility allows direct replacement of multiple fixed-output regulators in diverse power architectures.
How does the ISL91107IRTAZ-T handle input voltages crossing the output voltage?
The ISL91107IRTAZ-T automatically and seamlessly transitions between buck and boost operating modes when the input voltage crosses the regulated output voltage - without output disturbance or control-loop interruption. This behavior is enabled by its 4-switch topology and real-time PWM controller arbitration, ensuring continuous regulation during battery discharge or multi-source power switching scenarios.
What is the purpose of the separate VIN and PVIN pins on the ISL91107IRTAZ-T?
VIN supplies bias power to the internal reference and control circuitry, while PVIN delivers high-current power to the switching MOSFETs. Separating these paths isolates analog reference stability from high di/dt switching noise, improving output accuracy and reducing sensitivity to input ripple. Both pins accept 1.8V–5.5V, but VIN draws significantly less current than PVIN.
Does the ISL91107IRTAZ-T include built-in protection features?
Yes, the ISL91107IRTAZ-T integrates short-circuit protection (via FB under-voltage detection), thermal shutdown (150°C with 30°C hysteresis), input undervoltage lockout (1.75V rising threshold), and anti-shoot-through logic for gate drivers. These protections operate autonomously without external components, enhancing system reliability in unattended or harsh-environment deployments.
Can the ISL91107IRTAZ-T be used with a 1µH inductor?
Yes - the ISL91107IRTAZ-T is optimized for 1µH inductors, as confirmed in the datasheet's recommended design (Figure 23) and inductor vendor table. A 1µH shielded ferrite inductor rated for ≥4.1A saturation current meets all operational requirements, enabling minimal solution size and excellent transient response due to the 2.5MHz switching frequency.
ISL91107IRTAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 5.2V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (3x4)
ISL91107IRTAZ-T FAQ
1.How can I place an order for ISL91107IRTAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91107IRTAZ-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL91107IRTAZ-T reliable?
The price and inventory of ISL91107IRTAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91107IRTAZ-T is usually 5 days.
3.What payment methods are accepted for ISL91107IRTAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91107IRTAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91107IRTAZ-T?
ISL91107IRTAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91107IRTAZ-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL91107IRTAZ-T?
For technical support, including ISL91107IRTAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91107IRTAZ-T requirements.
6.How does Aetrix verify that ISL91107IRTAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91107IRTAZ-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL91107IRTAZ-T meets industry standards.
7.What is the process for return or replacement of ISL91107IRTAZ-T?
All ISL91107IRTAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91107IRTAZ-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL91107IRTAZ-T part is unused and in its original packaging.
Return procedure for ISL91107IRTAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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